package com.starlight.easybuyprictice.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.starlight.easybuyprictice.interceptor.FreeTokenAuthentication;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;



import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;


/**
 * @Author yfy2001
 * @date 2022/11/28 20:56
 */
@Controller
public class CaptchaImageCreateController {
    private Producer captchaProducer;

    public CaptchaImageCreateController(Producer captchaProducer) {
        this.captchaProducer = captchaProducer;
    }


    @RequestMapping("/captcha-image")
    @FreeTokenAuthentication
    public ModelAndView handleRequest
            (HttpServletRequest request, HttpServletResponse response) throws Exception{
        response.setDateHeader("Expires",0);
        response.setHeader("Cache-Control","no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control","post-check=0,pre-check=0");
        response.setHeader("Pragma","no-cache");
        response.setContentType("image/jpeg");

        String capText=captchaProducer.createText();
        System.out.println("veryCode:"+capText);
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY,capText);
        BufferedImage bi=captchaProducer.createImage(capText);
        ServletOutputStream out=response.getOutputStream();
        ImageIO.write(bi,"jpg",out);
        try {
            out.flush();
        }finally {
            out.close();
        }
        return null;
    }
}
